词典释义：
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This is the central valley today. And this, in a rare aerial survey from the 1930s, shows the exact same valley as a barren desert. The valley's natural state.
这是今天的中央山谷，而这里是上世纪30年代拍摄的同一地区的航拍图象，看上去，这同样的地方在当时，仍然是荒凉的沙漠，这是山谷原本的状态。
《America Revealed》《透视美国》
双语例句
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They are going to take a full aerial survey of the mountain area.
他们将对山区作全面的航空测量。
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The author proposes that aerial survey camera should be calibrated…
文章建议，航摄仪在检定时应加戴航摄时使用的滤光片。
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At present, aerial survey is an important way to acquiring geographic information.
航测是目前获得地理信息的重要手段之一。
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The author proposes that aerial survey camera should be calibrated with the same filter in…
文章建议，航摄仪在检定时应加戴航摄时使用的滤光片。
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Canadians always have been good mappers and aerial survey specialists, and it was the highest of high tech.
加拿大总是有好的制图和航空测量专家，并且是精英中的精英。
近义词
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